Brain Teaser (light) - How well do you understand weighted averages?

Brain Teaser (light) - How well do you understand weighted averages?
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1 Answer

Answer :

The final grade is greater than 88 (which would be the grade if they were all waited equally. Since the higher grades are both worth more than the lower grade, the final grade must be greater than that). The final grade is less than or equal to 93.96 (assuming the percentages are whole percentage points, not decimals). This figure assumes the quiz is worth 0%, the midterm worth 1%, and the final worth 99%. So I’m sure we can say the final grade is greater than 88 and less than 93.96. I’m willing to bet we can say more than that, but this is as far as I get right now….
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